Title: PREDICTION METHOD OF THE UNSTEADY LIFT ACTING ON AN OSCILLATING THREE-DIMENSIONAL HYDROFOIL SUBMERGED UNDER A FREE SURFACE
Abstract:Hydrofoil vessels, which are supported partially or totally by the foil lift, have been widely investigated. accurate estimation of the unsteady lift acting on the foil is important to predict the ves...Hydrofoil vessels, which are supported partially or totally by the foil lift, have been widely investigated. accurate estimation of the unsteady lift acting on the foil is important to predict the vessel's motion on the wave. This paper presents the theory of the unsteady lift acting on an oscillating three-dimensional hydrofoil submerged under a free surface and the results of numerical calculation. The method of images is employed to account for the free surface and a formula is derived on the assumption that ratio of span to average chord (aspect ratio) is not too small. The validity of this theory is confirmed due to the good agreement of experimental and theoretical values. As a result of calculating the unsteady lift of the three-dimensional hydrofoil in various conditions, the relations between the characteristics of the lift and the submerged depth, aspect ratio, and reduced frequency respectively are clarified.Read More
Publication Year: 1991
Publication Date: 1991-01-01
Language: en
Type: article
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